1103212111 has 2 divisors, whose sum is σ = 1103212112. Its totient is φ = 1103212110.

The previous prime is 1103212087. The next prime is 1103212139. The reversal of 1103212111 is 1112123011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1103212111 - 2⁷ = 1103211983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1103212091 and 1103212100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103212711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551606055 + 551606056.

It is an arithmetic number, because the mean of its divisors is an integer number (551606056).

Almost surely, 2^1103212111 is an apocalyptic number.

1103212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103212111 is an equidigital number, since it uses as much as digits as its factorization.

1103212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1103212111 is about 33214.6369993712. The cubic root of 1103212111 is about 1033.2839263809.

Adding to 1103212111 its reverse (1112123011), we get a palindrome (2215335122).

The spelling of 1103212111 in words is "one billion, one hundred three million, two hundred twelve thousand, one hundred eleven".